Metal-drawing apparatus



Aug. 7, 1928.

1,679,906 D. c. KINNEAR METAL DRAWING APPARATUS Filed March as, 1927 2Sheets-Sheet IN V EN TOR.

A TTORNEYS.

Aug. 7, 1928.

1,679,906 D. C. KINNEAR METAL DRAWING APPARATUS Filed March 23, 1927 2Sheets$heet 2 755*? 62 60 Z) 4 \K\\\\\\\\K1 V INVENTOR.

A TTORNEYS.

Patented Au 7, 1928.

v UNITED STATES PATENT OFFICE.

v IDELAMAR G. KINNEAR, OF. WATERBURY, CONNECTICUT, ASSIGNOR TO THEAMERICAN BRASS GOMFANY, OF WATERBURY, CONNECTICUT, A CORPORATION OFCONNECTI- die and die holder for such apparatus.

member are engaged thereby,

CUT.

METAL-DRAWING APPARATUS.

Application filed March 23, 1927. Serial No. 177,529.

My invention relates to a .metal-drawing apparatus and has for its obect to provlde an apparatus for couphng two cable ends to- I gether bydrawing a tubular metallic me1nher surrounding the two ends so as tocause it to engage said ends and form a strong holding contacttherewith. It further has for its object to provide a new and improvedIt further has for its object to provide an apparatus which can beeasily assembledand taken apart when desired.

The following is a description of an embodiment of my invention,reference being had to the accompanying drawings, in which: Figure 1 isaside elevation of a hand tool embodying my invention;

A Fig. 2 is an end elevation of the same;

Fig. 3 is a'section on the line 8-43, Fig. 1 Fig. 4; is a section on theline l-.-l, Fig. 3

Fig. 5 is a section on the line 5.5, Fig. Fig. 6 is a section on theline 6-6, Fig. Fig. 7 is a similar section with one-half of the dieremoved; i

Fig. 8 is a perspective view of one-half of the drawing die;

I. Fig. .9 is a section on the line and i Fig. 10 is a perspective viewof a removable holding clamp face-member. Referring more particularly tothe drawings, 2 is a support thereby and having a socket. 6 for atwopart drawing die 8. This two-part drawing die has a circumferentialgroove 10, into which extend projections 12 carried by the die socketsot-hat when the two portions of the die are turned into the positionsshown in Fig. 6 portions of the groove in each die and when the dieisturned in the position shown in Fig. 7, one die member is disengagedso that it can 9-4), Fig 1;

.be withdrawn therefrom so as to unblock the slot 14.. The socket has inone side the slot 14: making the socket opensided so that a strand ofcable with a sleeve conductor ,thereon can be passed therethrough andthus laterally introduced from the die. After lateral introduction theinto "or withdrawn removed portion of the die is replaced and vthe dieturned to the positionshown in Fig. "6, in which position the twoportions of the ldie are engaged by the projections 12 so as for a slide4 carried.

to be held within the socket, and after the drawing operation iscompleted the die section is removed so that the cable can be withdrawnlaterally through the slot 1 1.

The slide t is provided on its bottom face with ratchet teeth 16, withwhich engages a ratchet 18 pivotally mounted by a trunnion at 20 in asocket on one arm of a lever 22 which lever is also provided with atrunnion port 2, the pawl trunnlon and its socket being located betweenthe trunnion 24: and the slide l. 26 is a spring wound about a pin 28.One end of the spring bears against the pawl 18 so as to hold it inengagement with the. ratchet teeth on the bottom of the slide, while theother end engages the lever 22. The pin 28 is removable and acts as astop for the shoulder 30 formed upon the lever 22 to limit its movement.The lever 22 is provided with a'hanctgrip 32 and from the support 2extends another lever 34 rigidly connected thereto and provided with ahandgrip 36.

Rigidly connected to the support 2 is a clamp jaw 38 with whichcooperates a clamping arm 40 pivoted at 42 and held in position by aclamp bolt 44 swinging about the pivot 46, the jaw and armbeing providedwith removable faces 89 and 41.

I The drawing dies and the clamp faces are respectively provided ontheir outer ends with shoulders 9 and 47 abutting the corresponding endsof their sockets so that no other means are necessary for preventingtheir longitudinal movement within their sockets during the drawingoperation.

The pawl 18 is provided with a pin L8 forming a handle by which the pawl18 can be manually retracted against the action of the spring 26 so asto disengage the pawl from the rack upon the slide, so as to permit theslide to be retracted. y

In using this tool a tubular coupling member 50 is passed over the twoends 5254 of a cable, which may be composed oi a single strand. Thistubular member has a reduced portion 56 which, after the member isplaced upon the two ends of the cable, can be passed laterally throughthe slot 14 and located between the two parts of the drawing die 8, onepart of the drawing die being removed during this insertion andafterward restored in place, the two parts being 24 which enters abearing socket in the supp the pawl 18, and causing action with.

, pose of clearness,

engagement of the (is then secured in place aboutthen' turncdto theposition shown inFig.

6 so as to be held within the socket by the pins 12 with portions of thegroove in the two parts thereof. f desired the tubular through the die8without removing either part and the cable ends then inserted. After theparts are assembled within the tool the arm of the clamp carried by thesupport the reduced p ortion 56 so as to firmly clamp the same. Thelever 22 is then reciprocated, actuating it to engage the rack 16 uponthe slide 1- and move the slide from right toleft 2) so as to cause thedrawing-die to move away from the clamp, This draws the metal of thetubular member 50, bringing it into intimate relation with the twoendsof the cable within it,}causing it to assume a strong holdin the twoends so that the two ends are coupled together in a positive manner. i

. When the coupling member and end portions of the cable are placed inthe apparatus, theslide 4 is preferably moved so that the dieis closelyadjacent to the clamp. The parts inFigs. 1 and5 are, for the purshownwith the die somewhat removed from the clamp as they would be after thecoupling member and cable ends have been placed in the tool and thelever 22 actuated so as to move the slide somewhat to theleft.

When the full length of the tubular coupling member has been drawn, thearm 40 is opened so:as to release the couplingmemtion, the-pawllSis herand the drawing die within the socket 6 having by that time passedoverthe coupling member, the die portions can be turned to the positionshown in Fig. 7 so that one of them can be removed as there shown andthe cable Withdrawn laterally through the slotlgt.

To restore the parts to theirinitial posiwithdrawn from the rack 16 by.the handle 48 and the slide 4 pushed or retracted to initial position.The support has an overhanging portion 58 beneath which an upper portionof the; lever 22; and the tooth portion of the .pawl -18 normally 7extend so that the trunnions of the lever 22' and the pawl 18 arethereby held within their sockets. If, however, the pin 28 is removed,the pawl18 can beswungldownward so that the trunnion 10f thepawl 'can beremoved from its socket andjthe lever 22 can thereafter be swung outwarduntil the portion 60 is withdrawn 7, fromthe,,0verhang, whereuponthetrunnion of thelever-22can be withdrawn from its socket. By reason ofthis construction the 'pawhilever and i p support canlbe easily asmledfand disassembled, 62 is a friction spring. 1 r

member can be threaded For use in couplings of dill'erent sizes, drawingdies of dillcrent diameters can be substituted. The clamp 1s made withre- 'movable clamping faces so that clamps suitable for couplings ofdifferent sizes may be substituted one for the other.

As Will be evident to those skilled in the art, my invention permitsvarious modilications without departing from the spirit thereof or thescope of the appended claims.

What I claim is:

1. In a device of the character described, the combination of-a support,a slide movably mounted on said support and provided with a series ofteeth, a clamp and adie, one mounted rigidly on said support and theother on said slide, a pawl engaging said slide, and means carried bysaid support for reciprocating said pawl so as to successively engagesaid teeth and move said die and clamp away from each other.

2. In a device of the character described, the combination of a support,a slide movably mounted on said support, a clamp rigidly mounted on saidsupport and provided with a series of teeth, a die rigidly mounted onsaid slide so as to be carried thereby, a pawl engaging said slide, andmeans carried by said support for reciprocating said pawl so as tosuccessively engage said teeth and move said die away from said clamp.

3. In a device of the character described, the combination of a support,a slide movably mounted on said support, a clamp and a die, one mountedrigidly on said support and the other on said slide, a pawl engagingsaid slide, andmeans carried by said support for reciprocating said pawlso as to move said die and clamp away from each other, said meanscomprising a lever pivotally connected to said support, one arm of whichengages and actuates said pawl, and a second lever rigidly connected tosaid support.

4. In a device of the character described, the combination of a support,a slide movably mounted on said support, a clamp and adie, one mountedrigidly on said support and the other on said slide, a pawl engagingsaid slide, means carried by said support for reciprocating said pawl soas to move said die and clamp away from each other, said meanscomprising a lever pivoted to said support and to said pawl on difierentcenters, and a secondlever rigidly connected to said support.

5. In a device of the character described, the combination of a support,a slide movably mounted on said support, a clamp and a die, one mountedrigidly on said support and the other on said slide, a pawl engagingsaid slide, means carried by said support for reciprocating said pawl soas to move said die away from said clamp, said means comprising a leverpivoted to said support and to saidpawl on dififerent centers, and asecond lever rigidly connected to said support, the pivot of said pawlbeing between said slide and the pivot of said lever to said sup port.

6. In a device of the character described, the combination of a support,a slide movably mounted on said support, a clamp rigidly mounted on saidsupport, a die rigidly mounted on said slide so as to be carriedthereby, a pawl engaging said slide, means carried by said support forreciprocating said pawl so as to move said die away from said clamp,said means comprising a lever pivoted to said support and to said pawlon diilerent centers, and a second lever rigidly connected to saidsupport, said pivots comprising separable sockets and trunnions and saidsupport having an overhanging normally engaging said lever and pawl soas to holdsaid trunnions within said sockets, and a removable stoppreventing the withdrawal of said lever and pawl from beneath saidoverhang, said lever and pawl being with drawable from beneath saidoverhang when.

said. stop is removed.

7. In a device of the character described,

the combination of a support, a slide movably mounted on said support, aclamp and a die, one mounted rigidly on said support and the other onsaid slide, a pawl engaging said slide, and means carried by said support for reciprocating said pawl so as to move said die away from saidclamp, said die being longitudinally, split and having a cylindricalexteriorand said die carrying member-having a circular open-sided socketin which said cylindrical die fits.

8. In a device 01 the character described, the combination of a support,a slide movably mounted on said support, a clamp and a die, one mountedrigidly on said support and the other on said slide, a pawl engagingsaid slide, means carried by said support for reciprocating said pawl soas to move said die away from said clamp, said die being longitudinallysplit and said die carrying member having a circular opensided socket inwhich said die fits, said die having a circunrlferential groove and saidsocket having projecting means adapted to engage a portion of the groovein each part of the die.

In testimony whereof, I have signed my name to this specification this22nd day of March, 1927.

DELAMAR C. KINNEAR.

GERTEFECATE 0F GURRECTMN.

Granted August 7, 1928, 5:0

Pawn N0 1, 679, 9 G".

ered patent flaim 2, aher vii abave mm mmided W011i "suppmw in line theWan! s wmma "am? te sth and imeri {Em with a serie mm @Emmfiu he readwith this $0 the re ard 0f tha case time Pat- 8, same paw am mm; andthat i cnrmcimn themin mat the may (2021mm ent flffiseo Signed andseamed this 2nd day 01 ficmimr, A 19253.

M. J. Mame,

Fatents.

Acting Cam-H isswnar 0 (Seal)

